Meanings
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1
verb
to warn someone about a danger, problem, or event before it occurs
The guide will forewarn visitors about the steep drop beside the path.
Thesaurus
Etymology
From Middle English forewarnen and Old English forewarnian, formed from fore-, 'before or in advance,' + warn. Cognates include German vorwarnen and Swedish forvarna. Its meaning has remained the transparent one: to give warning beforehand.